Add installation and usage documentation

Author: DivineOmega

README.md

@@ -1,3 +1,60 @@
 # Dates Timezone Conversion Trait
+
 This package provides a trait that automatically converts an Eloquent 
 model's dates to and from the current user's timezone.
+
+## Installation
+
+Dates Timezone Conversion Trait can be easily installed using Composer. 
+Just run the following command from the root of your project.
+
+```
+composer require divineomega/dates-timezone-conversion-trait
+```
+
+If you have never used the Composer dependency manager before, head 
+to the [Composer website](https://getcomposer.org/) for more 
+information on how to get started.
+
+## Usage
+
+First, you must add a `timezone` field to your application's main `User`
+model and populate it will an appropriate timezone. Please see this [list
+ of supported timezones](https://secure.php.net/manual/en/timezones.php).
+
+Then, to benefit from this trait, simply `use` it within any Eloquent Model. 
+An example of a `User` model with the trait being used is shown below.
+
+```php
+<?php
+
+namespace App\Models;
+
+use DivineOmega\DatesTimezoneConversion\Traits\DatesTimezoneConversion;
+use Illuminate\Notifications\Notifiable;
+use Illuminate\Foundation\Auth\User as Authenticatable;
+
+class User extends Authenticatable
+{
+    use Notifiable, DatesTimezoneConversion;
+    
+    protected $dates = [
+        'last_logged_in_at',
+        'created_at',
+        'updated_at'
+    ];
+    
+    /* snipped */
+}
+```
+
+After using the trait, the following transformation will automatically be 
+applied to any attributes defined in the model's `$dates` array, if a 
+user is currently logged in.
+
+* When reading an attribute (e.g. `$user->last_logged_in_at`), the datetime
+object will automatically be converted to the user's timezone.
+
+* When writing to an attribute (e.g. `$user->last_logged_in_at`), the datetime
+will automatically be converted to the Laravel application's timezone (as 
+defined in the `config/app.php` file).